Euryaspis Blanchard, 1850

Fuhrmann, Juares & Vaz-De-Mello, Fernando Z., 2017, Macrodactylini (Coleoptera, Scarabaeidae, Melolonthinae): primary types of type species and taxonomic changes to the generic classification, European Journal of Taxonomy 350, pp. 1-71 : 31-32

Euryaspis Blanchard, 1850 , revalidated

Ctenotis Burmeister 1855: 20 , syn. nov. Type species: Ctenotis obesa Burmeister, 1855 (designation: monotypy).

Euryaspis Lacordaire, 1856: 259 (synonymy with Plectris ).

Type species

Euryaspis gaudichaudii Blanchard, 1850 (designation: monotypy).

Diagnosis

Clypeus transverse, narrow, posterior angle partially covering the canthus ( Fig. 12 A ), ventral area deflected vertically; pronotal anterior and posterior margins not beaded, lateral margins crenulate, posterior margin prominent ( Fig. 12 A ), prosternum anteriorly concave (similar to Fig. 12 K ); protibia with three external teeth and with a spur ( Fig. 12 A, C ); elytral striae indistinct, posterior and posterointernal margins not beaded; abdomen with intersegmental membrane VII–VIII concealed.

Remarks

The present study proposes the synonymy of Ctenotis with Euryaspis and revalidates Euryaspis , formerly a synonym of Plectris , based on the following characters (opposition to Plectris ): pronotal lateral margins crenulate (margins straight), posterior margin prominent (not prominent); internal area of metatarsomere V without spine-like setae (with spine-like setae).

Euryaspis is distinguished from other Macrodactylini by having a narrow and transverse clypeus, pronotal lateral margins crenulate and posterior margin strongly prominent.

According to the new synonymy proposed here ( Ctenotis synonym of Euryaspis ), the genus now comprises two species: E. gaudichaudii (type species of Euryaspis ) and E. obesa ( Burmeister, 1855) comb. nov. (type species of Ctenotis ). Euryaspis gaudichaudii is distinguished as follows (opposition to E. obesa ): antennal clavae of male and females with three antennomeres ( Fig. 12 B ) (four antennomeres, Fig. 12 A ); protarsomere IV about twice as long as wide ( Fig. 12 C ) (as long as wide, Fig. 12 A ); protarsal claws gradually curved ( Fig. 12 C ) (abruptly curved, Fig. 12 A ); male abdominal ventrites with a medial comb of long setae (setae homogeneously distributed).

Figures

Fig. 12. ♂♂. A. Head–prothorax dorsal, tarsus rotated laterally to apex. B. Antenna. C. Protibia−tarsus. D−I. Aedeagus (lateral, parameres apex). J. Metatibia. K. Head−prothorax, ventral. A, F−G. Euryaspis obesa (Burmeister, 1855) comb. nov. B−E. Euryapsis gaudichaudi Blanchard, 1850. H−J. Philochloenia amata nom. nov. K. Philochloenia castaneipennis (Guérin-Méneville, 1831) comb. nov. Scale bars = 1 mm.